Separable fastener



F. S. CARR.

EPARABLE FASTENER.

ICATION FIILED JAN-16, 1920-- Patented Aug;- 9,1921.

I v/verifier Red 8.6a2 2 YAT PATENT tries.

FRED S. CARR, OF NEWTON, MASSACHUSETTS, =ASSIGNOR TO'CARR FASTENER COMPANY, OFCAMBRIDGE, MASSAGHUSETTS,..A CORPORATION OF MAINE.

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Specification of Letters Patent.

, Patented Aug.9,=1921.

I Applicationfiledjanuary 16,- 1920. .Seria I No. 351,769.

- zen of the United States, and a resident of Newton, in the county of Middlesexuand Commonwealth of Massachusetts, have invented an Improvement in Separable Fasteners, of which the following description, in connection with the accompanying drawings, is a specification, like characters on the drawings representing like parts.

This invention pertains to improvements in separable fasteners, and more particularly, though not exclusively, to separable fasteners of the three-side lot type particularly well adapted for use in connection with the fastening of automobile curtains and the like.

It is among the objects of the invention to provide a stud and socket fastener of simple construction wherein the strain between the stud and socket shall normally be takenby unyielding engaging parts while the stud and socket are resiliently held in engagement. Other objects of my invention will be described later in the specification.

Referring to the drawings, wherein I have elected to show a preferred form of one illustrative embodiment of my invention Figure 1 is a front elevation of a portion of a preferred form of my invention;

Fig. 2 is a longitudinal section, partly in elevation, on the line 2-2 of Fig. 1;

Fi 3 is an elevation, partly in section, on the hue 3-3 of Fig. 2; and

Fig. 4 is a section, partly in elevation, on the line 4-4 of Fig. 2.

Referring to the drawings and the preferred embodiment of my invention selected for illustrative purposes, I have shown a fastener including a stud having a head 5, a neck 6, and a shank portion*7 cooperating with a socket including a fixed and unyielding jaw element 8 adapted to engage with the neck 6 of the stud, a spring jaw element 9 also adapted to engage the neck of the stud, and a strain-receiving shank-engaging portion 10 opposite the fixed jaw portion 8.

The socket preferably includes, as shown, a j aw-containing casing 11 and a cooperating socket-inclosing plate 12 which preferably carries the fixed jaw 8. The stud-engaging edge of the jaw 8 is preferably rounded, as shown, substantially to conform to the shoulder on the stud between the neck 6 and. the head 5.

The socket may be secured to the curtain 13 by a clench plate 14, whichis preferably provided with an elongated opening to permittipping of the socket relative to the stud in one direction only.

The fastener her'ein disclosed resembles somewhat those shown in my issued patents, numbered 1,278,798 and 1,278,799, but differs therefrom in several respects which materially contribute to the smooth and certain operation of the device.

For instance, the rounding of the fixed jaw 8 at its edge not only provides greater.

conformity between thefixed jaw and the shoulder on the stud, but facilitates separation of stud and socket by permitting a smooth sliding action when .the stud and socket are tipped one relative to the other in the direction shown'by the arrow in Fig. 2. The rounding of this edge also to some extent renders smoother the action of engaging and disengaging the stud and socket. The shaping of the unyfielding jaw element 8 to conform more nearly to the shape of the aperture through which the head of the stud enters promotes facility of engagement and of disengagement when the parts are relatively tipped in the predetermined direction, and the improved shape of the stud illustrated over that shown in the foregoing patents also contributes to certainty of ease of operation.

The stud and socket parts shown in the present drawings are also adapted to oppose separation of stud and socket by pressure inward on the upper portion of the socket such pressure in the present disclosure serving to wedge the parts more firmly together. This feature of my invention is claimed in a co-pending application filed herewith, Serial No. 351,768.

While I have shown and described a'pre- 1 neck, a socket providing a stud-receiving I aperture therein having at one side thereof a fixed jaw for engagement with the neck of the stud, and on the other side thereof resilient means for pressing the neck of the stud into engagement with said fixed jaw, the shoulder between the neck of the stud and the head thereof being inclined, and the neck-engaging face of the fixed jaw being rounded in longitudinal section.

2. A separable fastener comprising, in

combination, a stud having a head and a neck with a sloping shoulder between them, said stud cooperating with a socket having a stud-receiving aperture and providing a fixed aw having a marginal portion curved in a direction transverse to the general plane of the socket, said stud and socket separable by relative tipping movement about said fixed jaw as a fulcrum.

3. A separable fastener comprising, in combination, a stud having a head and a neck, cooperating with a socket having a stud-receiving aperture and providing a fixed jaw providing a marginal portion curved substantially to conform to the curve of the, stud-receiving aperture, the marginal portion of said jaw also being curved in another dimension substantially to conform to the slope of the shoulder between the head and the neck of the stud.

In testimony whereof, I have signed my name to this specification.

FRED S. CARE. 

